Password in user pods clears after minute of idle state.

chrome/browser/chromeos/login/webui_login_display.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/login/webui_login_display.h"
 
+#include "ash/wm/user_activity_detector.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_util.h"
 #include "chrome/browser/chromeos/input_method/input_method_configuration.h"
 #include "chrome/browser/chromeos/input_method/input_method_manager.h"
 #include "chrome/browser/chromeos/input_method/xkeyboard.h"
 #include "chrome/browser/chromeos/login/screen_locker.h"
 #include "chrome/browser/chromeos/login/wallpaper_manager.h"
 #include "chrome/browser/chromeos/login/webui_login_display_host.h"
 #include "chrome/browser/chromeos/login/webui_login_view.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/views/widget/widget.h"
 
 namespace chromeos {
 
+namespace {
+
+const int kPasswordClearTimeoutSec = 60;
+
+}
+
 // WebUILoginDisplay, public: --------------------------------------------------
 
 WebUILoginDisplay::~WebUILoginDisplay() {
   if (webui_handler_)
     webui_handler_->ResetSigninScreenHandlerDelegate();
+  ash::UserActivityDetector* activity_detector = ash::Shell::GetInstance()->
+      user_activity_detector();
+  if (activity_detector->HasObserver(this))
+    activity_detector->RemoveObserver(this);
 }
 
 // LoginDisplay implementation: ------------------------------------------------
 
 WebUILoginDisplay::WebUILoginDisplay(LoginDisplay::Delegate* delegate)
     : LoginDisplay(delegate, gfx::Rect()),
       show_guest_(false),
       show_new_user_(false),
       webui_handler_(NULL) {
 }
 
 void WebUILoginDisplay::Init(const UserList& users,
                              bool show_guest,
                              bool show_users,
                              bool show_new_user) {
   // Testing that the delegate has been set.
   DCHECK(delegate_);
 
   users_ = users;
   show_guest_ = show_guest;
   show_users_ = show_users;
   show_new_user_ = show_new_user;
+
+  ash::UserActivityDetector* activity_detector = ash::Shell::GetInstance()->
+      user_activity_detector();
+  if (!activity_detector->HasObserver(this))
+    activity_detector->AddObserver(this);
 }
 
 void WebUILoginDisplay::OnPreferencesChanged() {
   if (webui_handler_)
     webui_handler_->OnPreferencesChanged();
 }
 
 void WebUILoginDisplay::OnBeforeUserRemoved(const std::string& username) {
   for (UserList::iterator it = users_.begin(); it != users_.end(); ++it) {
     if ((*it)->email() == username) {
@@ skipping 251 matching lines @@
 
 void WebUILoginDisplay::SetDisplayEmail(const std::string& email) {
   if (delegate_)
     delegate_->SetDisplayEmail(email);
 }
 
 void WebUILoginDisplay::Signout() {
   delegate_->Signout();
 }
 
+void WebUILoginDisplay::OnUserActivity() {
+  if (!password_clear_timer_.IsRunning())
+    StartPasswordClearTimer();
+  password_clear_timer_.Reset();
+}
+
+void WebUILoginDisplay::StartPasswordClearTimer() {
+  DCHECK(!password_clear_timer_.IsRunning());
+  password_clear_timer_.Start(FROM_HERE,
+      base::TimeDelta::FromSeconds(kPasswordClearTimeoutSec), this,
+      &WebUILoginDisplay::OnPasswordClearTimerExpired);
+}
+
+void WebUILoginDisplay::OnPasswordClearTimerExpired() {
+  if (webui_handler_)
+    webui_handler_->ClearUserPodPassword();
+}
+
 }  // namespace chromeos